Rock Identifier

Category

Organic (Biological Specimen)

Browse organic (biological specimen) specimens identified by the Rock Identifier community.

Chert (White Chert/Flint) (Chert (SiO2)) — sedimentary

Chert (White Chert/Flint)

Chert (SiO2)

Sandstone (likely Arkose or Quartz Sandstone) (Arenite (SiO2 principal component)) — sedimentary

Sandstone (likely Arkose or Quartz Sandstone)

Arenite (SiO2 principal component)

Bituminous Coal (Bituminous coal (Organic Sedimentary Rock)) — sedimentary

Bituminous Coal

Bituminous coal (Organic Sedimentary Rock)

Liesegang Ring Siltstone (Siltstone with iron oxide Liesegang bands) — sedimentary

Liesegang Ring Siltstone

Siltstone with iron oxide Liesegang bands

Moss Agate (Chalcedony (SiO2) with inclusions of hornblende or chlorite) — mineral

Moss Agate

Chalcedony (SiO2) with inclusions of hornblende or chlorite

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Black Pearl (Tahitian-style Cultured Pearl) (Calcium Carbonate (Aragonite) with Conchiolin (CaCO3)) — mineral

Black Pearl (Tahitian-style Cultured Pearl)

Calcium Carbonate (Aragonite) with Conchiolin (CaCO3)

Coal (Coal (Sedimentary Rock / Organic Rock)) — sedimentary

Coal

Coal (Sedimentary Rock / Organic Rock)

Fossilized Bivalve Shell (Fossilized Clam) (Bivalvia (class) / CaCO3 (Calcium Carbonate)) — fossil

Fossilized Bivalve Shell (Fossilized Clam)

Bivalvia (class) / CaCO3 (Calcium Carbonate)

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Chert / Flint (Silicon Dioxide (SiO2)) — sedimentary

Chert / Flint

Silicon Dioxide (SiO2)

Chert (Yellow Jasper/Flint) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Yellow Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Yellow Chert (Jasper)

Silicon Dioxide (SiO2)

Ironstone Concretion (Goethite-rich Siltstone / Siderite (FeCO3)) — sedimentary

Ironstone Concretion

Goethite-rich Siltstone / Siderite (FeCO3)

Chert (Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert (Jasper/Jasperoid) (Chert (chemically precipitated microcrystalline Quartz, SiO2)) — sedimentary

Chert (Jasper/Jasperoid)

Chert (chemically precipitated microcrystalline Quartz, SiO2)

Chert (Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint var.) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint var.)

Silicon Dioxide (SiO2)

Coal (Anthracite / Bituminous) (Organic Sedimentary Rock (Carbon-based)) — sedimentary

Coal (Anthracite / Bituminous)

Organic Sedimentary Rock (Carbon-based)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert (Flint) with Iron Staining (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint) with Iron Staining

Microcrystalline Quartz (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Petrified Wood (Silicified Wood (mainly Quartz / SiO2)) — fossil

Petrified Wood

Silicified Wood (mainly Quartz / SiO2)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Fossil Shark Tooth (Carcharodon or Carcharias fossil (Vertebrate Fossil)) — sedimentary

Fossil Shark Tooth

Carcharodon or Carcharias fossil (Vertebrate Fossil)

Chert (Yellow Jasper variant) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper variant)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Chert (SiO2)) — sedimentary

Chert

Chert (SiO2)

Chert (Flint) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Jasper (Red Jasper) (Silicon Dioxide (SiO₂)) — sedimentary

Jasper (Red Jasper)

Silicon Dioxide (SiO₂)

Fossilized Coprolite (Coprolite (fossilized feces)) — sedimentary

Fossilized Coprolite

Coprolite (fossilized feces)

Anthracite Coal (Anthracite) — sedimentary

Anthracite Coal

Anthracite

Amber (Succinite (Fossilized Tree Resin), C10H16O) — Organic Mineraloid

Amber

Succinite (Fossilized Tree Resin), C10H16O

Organic Mineraloid

Amber (with potentially inclusions) (Succinite (Fossilized Tree Resin)) — Mineraloid

Amber (with potentially inclusions)

Succinite (Fossilized Tree Resin)

Amber with Organic Inclusions (Succinite (fossilized resin)) — mineraloid

Amber with Organic Inclusions

Succinite (fossilized resin)

Chert (Flint/Gray Chalcedony) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint/Gray Chalcedony)

Silicon Dioxide (SiO2)

Chert (and/or River Pebble) (Microcrystalline silica (SiO2)) — sedimentary

Chert (and/or River Pebble)

Microcrystalline silica (SiO2)

Fossilized Horn Coral (Order Rugosa (Rugose Coral)) — sedimentary

Fossilized Horn Coral

Order Rugosa (Rugose Coral)

Chrysanthemum Stone (Celestine (SrSO4) or Calcite (CaCO3) in Limestone/Porphyry matrix) — metamorphic

Chrysanthemum Stone

Celestine (SrSO4) or Calcite (CaCO3) in Limestone/Porphyry matrix

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Petrified Wood (Silicified Wood (primarily SiO2)) — fossil

Petrified Wood

Silicified Wood (primarily SiO2)

Ammonite Fossil (Small Pyritized or Calcitized Internal Mold) (Ammonoidea) — sedimentary

Ammonite Fossil (Small Pyritized or Calcitized Internal Mold)

Ammonoidea